Heating means for centrifugal baskets



Jan. 27, 1948. P. V N RlEL 2,435,023

HEATING MEANS FOR CENTRIFUGAL BASKETS Filed Nov. 21, 1945 Patented Jan.27, 1948 HEATING ltIEANS FOR CENTRIFUGAL BASKETS Pieter van Riel, Delft,Netherlands, assignor to Machinefabriek Reineveld N. V., Delft,Netherlands, a company of the Netherlands Application November 21, 1945.Serial No. 630,078 In the Netherlands July 30, 1940 Section 1, PublicLaw 690, August 8, 1946 Patent expires July 30, 1960 4 Claims. (Cl.210-66) Thi invention relates to a centrifugal machine of the typewherein the wall of the drum is provided with a passage, or withpassages, through which a heating or a cooling liquid is adapted to flowunder the action of the centrifugal force.

In a known machine of this type the liquid, which is supplied to thejacketed bottom of the drum, is thrown outwards immediately afterreaching the top edge of the drum, so that only a small part of its heatcan be exchanged against that of the charge under treatment.

The invention has for its purpose to render the rate, at which the liqud flows through said passages, controllabl and to allow the liquid stillpresent therein after the charge has been subjected to centrifugaltreatment during the required time, to be discharged as' the speed ofthe drum decreases. In accordance with the invention, the drum isprovided with a jacketed bottom and with a jacketed top, bothcommunicating with the passages and both extending inward to a suitabledistance from the axis, a stationary supply and skimming pipe beingprovided so as to open into the bottom jacket.

The more or less diagrammatic drawing illustrates, by way of exampleonly, a centrifugal machine in accordance with the invention, Fig. 1being a vertical sectional elevation, and Fig. 2 a fragmentary sectionon the line IIII in Fig. 1.

The material to be treated is supplied through a pipe 3 centrally intothe drum or bowl 4. The peripheral wall of the drum is formed by acircular series of axially disposed and suitably spaced straight pipes5, interconnected by perforated webs 6, the smooth inner face of saidwall being lined by wire gauze 1.

The drum has a jacketed bottom 8 communicating with the lower ends ofthe pipes 5. Opening into said jacket is a stationary pipe 9. whosemouth extends radially outwards and which is connected, through athreeway cock Ill, to a pipe I l for supplying, and to a pipe ii! fordischarging a heating or a cooling liquid. Provided in said jacket areradial partitions l3 intermediate the bottom openings of the pipes 5.

At their tops, the pipes communicate with an annular, jacketed top I 4,which communicates, along its inner edge, with an annular chamber l5provided with a discharge nozzle Hi.

The described centrifuge operates as follows.

Let it be assumed that the drum 4 is driven at a suitable speed andcharged with material that is to be kept at a predetermined temperature,and that a heating liquid is supplied to the jack- 2 eted bottom 8 byway of the pipes II and 9. Owing to centrifugal action, aid liquid isthrown outward into the pipes 5 and forced to rise therein so as toenter the jacketed top l4, whence it is discharged, through the chamberI 5, by the nozzle 16. By using a liquid of suitable temperature andcontrolling, by means of the cock ill, the rate at which the liquidcirculates through the system 8, 5, l4, it is possible to keep thecharge at the desired temperature during its centrifugal treatment inthe machine.

After the treatment, the cock I'll is set to establish communicationbetween the pipes 9 and I2 and the speed of the drum 4 is reduced, sothat the liquid still present in pipes 5 is allowed to gradually sinkand be skimmed off by the pipe 9.

What I claim is:

1. In a centrifugal machine, a drum having a passage in the peripheralwall thereof, a jacketed top on said drum and a jacketed bottom on saiddrum, the said jacketed portions of said drum extending inwardly andhaving openings therein communicating with said passage in said wall,means for introducing a fluid to said jacketed portions and saidpassage, and a skimming and discharge pipe introduced in said jacketedbottom whereby said liquid may be removed from said bottom.

2. In a centrifugal machine, a drum having a passage in the peripheralwall thereof, a top member on said drum having spaced portions thereofdefining a compartment, a bottom member on said drum having spacedportions thereof defining a compartment said compartments extendinginwardly and having openings therein communicating with said passage insaid wall, means for introducing a fluid to said compartments and saidpassage, and a skimming and discharge pipe entering said bottomcompartment whereby said liquid may be removed from said compartment.

3. In a centrifugal machine as claimed in claim 2, the said peripheralwall of said drum comprising a circular series of axially disposed pipesinterconnected by perforated webs and the inner face of said wall havinga wire gauze lining, said pipes having openings in the ends thereofcommunicating with said openings in said top and bottom compartments,the said bottom compartment having radial partitions intermediate saidopenings in said axially disposed pipes thereby forming a passage forsaid fluid.

4. In a centrifugal machine as claimed in claim 2, the said fluidintroducing means comprising a, stationary injector inserted in saidbottom com- 3 4 partment and having a radial outward extending portionwith an opening therein and a con- UNITED STATES PATENTS trol valvecofiirifietefizbfshid injeco'or wliereby'flfe N fiifif? .f i .e D {Irate of flow- 6f' slaid liquid through said -injecsor 1 256 5 i: g andsaid passage in said drum may be controlled. 2243366 PIETER VAN RIEL. 5Van Riel May 27, 1941 I an v r FOREIGN PATENTS REFERENC S CITED"Nuiiiiii Country Date The following references are of record in the169,346 Germany (H P 1906 file of this patent: ,m 17j4,2?4,-Germai-iwHeine) Sept. 19, 1906

